Feed-machine for surface-dressing.



R. M. FOTHERINGHAIVI.

FEEDMACHINE FOR SURFACE DRESSING.

APPLICATION FILED )AN.Z6. 1917.

Patented Dec. 11, 1917 s SHEETS-sum1.

I) his aH'o/"m nur.

R. IVI. FOTHERINGHAIII. FEED MACHINE Foa SURFACE DRESSING. APPLICATION FILED JAN. 26, 1917.

, Patented Deo. 11, 1917.

3 SHEETS--SHEET 2.

IIIII Il f Vil lll Rl NI. FOTHERINGHAW.

FEED MACHINE FOR SURFACE DRESSING.

APPLICATION FILED IAN. 26. 191?. Patented Deo? 11, 1917.

3 SHEETS-SHEET 3.

FEED-MACHINE FOR SURFACE-DRESSING.

remco.

Specification of Letters Patent.

' AlE.atentiil Dec.. ill, iwi?.

Application led January 26, 1917. Serial No. 144,665.

To all whom t may concern:

Beit known that I, ROBERT M. Fo'rHER- iNGHAM, a citizen of the United States, re-

siding at Buffalo, in the county of Erie and State of New York, have inventedcertain new and useful Improvements in Feed-Machines for Surface-Dressing; and I do hereby declare the following to be a full, clear,

and exact description of the same, such as will enable others skilled in the art to which it appertains to make and use the same, reference being had to the accompanying drawings, vand to gures of reference marked thereon7 which form part of this specification.

Like figures of reference refer to like parts.

My invention relates to feed machines for surface dressing, wherein the surface to be dressed is fed to a buffing, a polishing, or a grinding wheel, which revolves about a fixed axis.

One object of my invention is to provide,

for automatically feeding articles of a variety of shapes and sizes to the dressing wheel, while controlling the pressure therebetween, these means being adapted to present any part of the work to the dressing wheel.

A further object of my invention is to provide means to rotate the work upon a movable axis, so as to present varying contours of the piece of work, rotatively, to the Adressing wheel.

A further object is to rovide means for governing the position o the movable axis upon which the work is rotated, so as to maintain a good contact of the work with the dressing wheel during the application of any part of the whole surface to be worked upon.

A further object of my invention is to provide, with means for rotating the work and means for governing its contact with the dressing wheel, other means capable of givchronism of the adjusted operating parts, after the' feed machine has once been set for handling a given shape and size of piece to be operated upon, by the dressing wheel.

A further object of my invention .is to adapt the mandrel to changes of angular position, relative to the face of the feed machine, whereby surfaces, at an angle to the axis of rotation of the piece of work, may be readily applied to the dressing wheel.

A further object of my invention is to provide motor driven means for carrying out any and all of the foregoing objects.

With these and other means 4in view, my invention includes certain details of construction, aHording means for automatically positioning the work to the dressing wheel. 'Ihese means includev a controlling cam, having its operatingsurface of a shapelconforming to that of the object worked u on. This vcam is connected with thevman rel, which holds the work by means of intervening mechanism. The movement of the cam is synchronized with that of the work and is governed by means of a spring pressed roller, in contact with the cam. The pressure of contact of the work with the operatingwheel is thus maintained, while the work is automatically presented to be operated upon.

Means are provided for longitudinally reciprocating the work, when a dressing wheel, narrower than the piece operated upon, is used. In addition to the above, means for enabling the operator to readily apply and release the work from the feeding machine, are also provided.

The form of my invention illustrated in the drawings is hereinafter' described, and

,what I claim is set forth. v

Figure 1. is a front elevation of -a feed' machine embodying ymy invention.'

Fig. 2. is a/sectional plan of the spring holding device ,adapted to releasably hold the work on the chuck.

Fig. 3. is a detached elevation showing a simple mandrel connection for the work, eliminating the variable angle attachment.

' Fig. 4. is a side elevation of the machine,

partly in section. L. I

.Fig 5. is a part sectional elevation of the oscillating member, and the attached bracket, showing the racks and gears for effectingthe reciprocatin movement.

Fig. 6. 1s a top plan o the machine.

Fig. 7. is a fragmentary viewr of themachine showing the motor, gearing connections Vand journaling of the oscillating frame.

Shown in the figures, is a bed plate marked 1,. having supporting rollers or casters 2, 2, and screw jacks 3, 3, adapted to support the machine above the floor off the rollers or casters 2, 2, after the machine h as been properly positioned to coperate with the dressing Wheel 4. Each jack screw 3 has a hand wheel 5, for releasably applying the jacks: Mounted upon the bed plate 1, is the electric motor 6, having a shaft 7, and a'small gear 8, ixed thereto. An oscillating member 9, having a base 10, is supported by its trunnions 11, and 12, journaled. in bearings 13, and 14, respectively; these bearings being co-axial with the motor shaft 7. ABetween the oscillating member 9, and its base 26 10, is a bearing plate 15. Clamp screws 16 16, rigidly clamp the three parts-9, 10 and .15, together at the flange 17.

. A reduction in speed from the motor 6, to the transmission gearing of the feed machine, is obtained through the meshing of the pinion 8, with the large gear 18, and the pinion 19, with the large gear 20; the pinion-19, being xed to or integral with the gear'v 18, which to ether are journaled on the shaft 21, fixed, int e member 9, free from and above the upper part 22, of the bearing 13.

The gear 2O is fixed upon the shaft 23, which is journaled co-axially in the trunnionspll, and 12. The shafts 7, and 23, have a common axis also. The shaft 23, passes through the cavity of the base 10, and has fixed upon it, Within said cavity, the bevel gear 24, which meshes with the bevel gear 25,. on the vertical shaft '26, passing up through and journaled within the bearing plate 15.

y From the shaft 23, the transmission gearing .is divided finto two parts, one part effectingO the motion of the Ywork across the vface ofthe dressing wheel, and the other part effecting the rotary motion of the said work. The latter part of the gearing has a branch connection with the governing cam, as will be hereinafter explained.

Considering the transmission gearing which effects the longitudinal movement of the work inthe line of its axis. rotation, beginning with the base 10, an extension 27, lhas journaled within it a shaft 28, having fixed thereon, at its inner end, a bevel gear 29, meshing with the bevel gear 25, and'fixed at its outer end is a pinion 30.- In the arm 4 31, which projects fromthe column 9, is

Fixed near the upper end of the column -9, is the vertical rack bracket 37, having journaled transversely within it a shaft 38,' at the outer end of which is socketed the hub 39, engaged by the Ahand lever 40. On the same shaft is fixed the pinion 41,by the locking pin 39u, and meshing with the sliding rack bar 42, in the vertical rack bracket 37. Fixed upon the rack bar 42, is the wrist pin 43, connected by the rod 44, with the crank pin 36; the connecting rod 44, being journaled on both pins 36, and 43. At the inner end of the shaft 38, is fixed the bevel gear 45,meshing with a bevel gear 46, fixed upon a sleeve 47, mounted concentrioally for rotation upon the shaft 26. .Atthe upper endof the sleeve 47, is fixed a spur gear 48, which meshes with a horizontal rack bar 49, in sliding engagement with the horizontal rack bracket 50, fixed or integral with the swiveling case 5l, which is journaled in the upper end of the columnv 9. Su-rmounting the casing 51, are two arms 52 and 53, supporting the respective bearings 54, and 55, and having extensions 56, and 57.

Considering next the gearing effecting the rotary motion of the chuck, holding the work, we have the clutch bevel gears 58 and 59, journaled in the bearings 54, and 55, held in longitudinal position by the respective collars 60, and 61, and meshing with the bevel gear 62, on the shaft 26, the slotted shaft 63, journaled for sliding engagement with the clutch bevel gears 58, and 59, and also journaled in the arms 64, and 65, which are fixed at the respective ends of the horizontal rack bar 49. Journaled in the extenslons 56 and 57, is the threaded shaft 66, having a hand Wheel 67, and acollar 68.

AThe shaft 66, is threaded for part of its naled in the ends of the arms 70, 7 0, are collar segment 71, 71, enga ing a circumferential groove 72, in the sliable clutch member 73, which is slidably keyed at 7 4, to the groove 75, in the shaft 63. l

Considering the variable angle transmission gearing, connected with the end of the shaft 63, an extension bracket 76, upon the arm 65, terminates in a hinging member 77, to which is pivoted a yoked bracket 78, having a bevel gear idler 79, journaled 'on the lower pivot pin 80. Fixed on the endpof the shaft 63, is the bevel gear 81, meshing with and preferably smaller than the idler'gear 79. J ournaled in the yoked piece 7 8, is the short shaft' 82, having the bevel gear 83,

fixed thereto and meshing with the idler gear 79. At the other end of the shaft 82, is detachably fixed the chuck 84, by means of thel set screw 85. 86 is a pan mounted upon the chuck 84, and held thereon by the arm 87. v

.l The following parts comprise those formmageos ing the spring holding device for holding the work upon the chuck; an extension 88, on the yoke bracket 78, terminates in a T piece 89, having in sliding engagement therewith a tube 90, adjustably fixed thereto by the set screw 91. Near one end of the tube 91, is adjustably fixed the collar 92, by means of the set screw 93. r1`he collar 92, has slots 94, for engagement with-the teeth 95, of the adjustable member 96, which member 96 slidably fits the tube 90. Within the tube 90, is the rod 97, slidably keyed on the tube by the key 98, and slidably controlled by the spring 99, fastened to the tube at the point 100.

The outer end of the rod 97 terminates in a threaded Vstem 101 engaged bya nut 10.2. The tube 90 extends through the sliding member 96, and is slidably'engaged by the nut 102. Extending integrally out from the sliding member 96is the arm 87, having a centering piece 103, journaledtransversely in the' end thereof.

\ In Fig. 3. the extension 88 is inserted in the socket end of the arm 65, and secured thereto by the set screw 105, instead of being attached to the yoke bracket 78, as shown in Fig. 1; thus eliminating the variable angle transmission gearing connected with the brackets 76 and 78. The tube 90, is also provided with internal parts similar to those shown in Fig. 2. rIhe stub end 63a, "of the shaft 63,'forms a mandrel in this case for the chuck 84, which is secured yto it by the screw 85.

For turning the swiveling casing 51, and all parts above and attached to it, so as to position the pan 86 in or out of contact with the ldressing wheel 4, there is provided a worm wheel 106, keyed at 51a to the upper part-of the casing 51, and meshing with a worm 107, fixed on a shaft 108, j/ournaled in a bracket 109, on the column 9. The shaft 108,'terminatesin a hand wheel 110.

For governing the pressure of contact of the work on the chuck. 84, with the dressing Wheel 4, there is shown the following mechanism in conjunction with that above described: J ournaled in the arm 111, of the bracket 109, on the column 9, is a shaft 112, having fixed at its inner end a bevel gear 113, meshing with a bevel gear 114, keyed to the shaft 26. At the outer end of the shaft 112, is fixed the cam 115, by means lof the set screw 116. The bevel gears 113 and 114, are equal in size or mitergears. The bevel gears 58, 59 and 62, are also miter gears, and the gears'81 and 83, are equal in size but not mitergears, therefore the pan 86- will make the same number of turns 4as the cam 115, and the direction of rotation can be determined by meshing the clutch member 73, with/either the miter gear 58 Mechanism governing the position yof the' member 123, the shaft is turned by the y hand wheel 120. Slidably engaged with the tubular member 123, is the threaded spindle 125, having fixed thereon the lock nuts 126, 126, abutting against the'y end of the tubular member 123, and having at itsl other end the head piece 127, provided with a longitudinal slot 128, adapted to slidably engage an interned key fixed upon the member 123. In the outer end of the head piece 127, is secured the stud 129, on which is journaled the roller 130, engaging the an nular recess 131, of the cam 115. There is thus provided a concave operative cam surface 1151, and a convex operative cam sur' face 11511, engaging said roller 130. Uompressed within the tubular member 123, and surrounding the spindle 125, is the spring 132.

For balancing the rocking member '9, and its attached parts, I'provide a leaf spring 133, fixed at the point 134, to the bed plate ing to conditions of operation, in the follow ing manner; there is shown 'in they figures, an extension 88, supporting a tube 90, upon which is slidably engaged a member 96, the member 96, having an arm 87. A tension spring 99, elastically draws the member 96, against a fixed collar 92, and teeth 95, engaging notches 94, in said collar 92, determine the angular position of the'arm 87 which in the drawings is shown to be parallel with an extension 88. The centering piece 103, journaled in.,the end of the arm 87, is thus forced against the pan 86. When itis desired to remove the centeringV piece 103, from contact with the pan 86, the arm 87, is drawn sufficiently out of the tube 90, to release the teeth 95. The arm 87 `is next rotated 180 degrees, so that the teeth95, can change places in engaging the notches 94, and be so held in an upright position as to be free from the article to be dressed, thereby permitting the removal of said article, and the placing of another upon said chuck 84.

The machine as a whole is then rolled on of the shaft 7.

the floor to the vicinity of the dressing Wheel 4,'and adjusted in position to have the pan 86, properly contact the Wheel 4, which 1s here assumed to be adapted to revolve about f a fixed axis.

Havingonce so positioned the machine, the chuck screws 3, are next forced to the floor by turning the respective hand Wheels 5, until the machine is lifted oil the rollers or casters 2, thus fixing the position of the machine on the floor With respect to the wheel 4. Prior to setting the machine in this position, the cam 115, is synchronously connected with the chuck 84, by transmission means hereinafter described, which transmission means rotates the cam 115, and the chuck 84, at the same number of revolutions.

The motion of reciprocation along the axis of the chuck 84, is provided for in the following way: Starting with the motor 6, revolving the Shaft 7 the speed thereof is reduced through the connectedgearing 8, 18, 19 and 20, the gear 20, turning the Shaft 23, at a much reduced speed, compared with that The rotation of the shaft 23, is connected with the vertical shaft l26, by means of the bevel gears 24, 25. Meshing with. the bevel gear 25, is the bevel gear 29, fixed on the shaft 28, to the outer end of which is fixed the pinion 30, which in turn revolves the gear 33, j ournaled on the shaft 32.

For a given limit of motion to the motion of reciprocation to the chuck 84, position the crank pin 36 properly withinthe channel 35, thereby governing the throw of the rack bar 42, reciprocating through the agency of the connecting rod 44. This motion of reciprocation of the rack bar 42, is communicated to the shaft 38, by means of the meshing of the pinion 41, with' the rack bar 42. lThis reciprocating motion, somewhat moditied according to the design of the intervening mechanism, is transmitted through the gears 45, 46 and 48, to the horizontal rack bar 49,giving a reciprocating motion to all parts connected therewith, including the chuck 84, and the pan 86 thereon. This reciprocating motion enables us t0 present all parts of the surface of the piece to be operated upon, to the dressing wheel, which in this 'case may be narrowerrthan the said piece.; ora slight reciprocating motion attained according to the design of the intervening mechanism, can then be imparted to the piece of work regardless of the width of the wheel, to prevent scoring in definite planes.

If desired, the pinion 41,1 may be disconnected :from rotation with the shaft 38, by withdrawing the locking pin 39a, from engagement therewith, whereby the operator will be at liberty to manually reciprocate the piece' of work, by oscillating the hand lever 40, which engages the socketed hubJ 39, thus ing through this substituting a manual oscillation of the shaft 38, for the automatic oscillation above described.

Now considering the rotation of the article to be dressed. Starting with the shaft 26, the slidable shaft 63, is rotated by means of the reversible clutch member 73, which is slidably keyed to the shaft 63. Rotation in either one or the other direction may be had, according to the engagement of the member 73, with one or the other of the bevel gears 58, and 59, both of which, meshing with the gear 62, fixed upon the shaft 26, revolve in opposite directions. The member 73, is positioned by turning the hand wheel 67, in either direction as desired, to cause the traveling nut 69, to move in one or the other direction; and causing the member 73, to engage one or the other of the clutch bevel gears 58 or 59. If it is desired to rotate the chuck 84, in direct connection with the shaft 63, then the assemblage of parts shown in Fig. 3. is used, wherein the extension 88, is connected with the arm 65. lilhcre it is dcsired to rotate the chuck 84, at an angle to the shaft 63, as well as having a common axis therewith, the mechanism shown in Fig. 1. is used, wherein the mandrel 82, is turned by means of the gearing connection engaging the gears 81, 79 and 83, the gear 7 9 being an idler.

The angular position of the chuck 84, is fixed by fixing the angular position of the yoked bracket 78, With respect to the extension bracket 76. Referring to ljig. 6. n this the pan 86, is shown to have assumed a dotted position 86, wherein its mandrel revolves about an axis at right angles to the axis of the shaft 63, thus adapting the pan in position to present a fiat face against the dressing wheel'4a. In order to attain this right angle position of the mandrel with respect to tli'e shaft 63, it is necessary to have the gears 81 and 83, smaller in diameter than the idler gear 79, with which they mesh. If instead of the pan 86, shown in the figures, having rectangular section, an object having Vconical section is centrally mounted upon the mandrel 82, an element of the conical .surface of the object, lying Within a horizontal plane coincident with the axis of rotation of the cone, can be made while passplane to be parallel with the axis `of the shaft 63; and if this element, While in the said horizontal plane, represents the line of contact of the conical object, with the dressing wheel, then the obiect can be moved longitudinally by the sliding movement of the shaft 63, in its bearing, and all parts of the conical surface of the object can be presented to a theel narrower than the length of the conical object.

In regard to releasing the object from the machine or applying one thereto. By turning the hand wheel 110, the worm 107 is rotated, causing the worm wheel 106, to rotate, and with it the swiveling casing 51, and all parts attached thereto, thus swinging the pan 86, in or out of contact with the wheel 4, as desired.

It will be noticedlin connection with Fig. 5, that I have shown ample clearance between the'swiveling case 51, and the bearing of the shaft 38, to allow for the necessary angular movements of the parts. Similar spacing for a similar purpose is shown in Fig. 1., in connection with the shaft 112.

Considering' next the parts provided to cause the cam 15,to properly function in governing the pressure contact of the pan 86, with the wheel 4. Referring particularly to Fig. 4; The cam 115, is shown having a concave operating surface 115, and a convex operating surface 1151, between which is positioned the roller 130, designed to so fill the space between the two surfaces 115a and- 115", as to roll on one thereof when loosely contacting the other. The position of the roller 130, governs the position of the cam 115, and consequently the position of the pan 86. This position of the roller 130, with respect to the standard 117, is fixed by the hand wheel 120, and the nut 124, in engagement with the threaded shaft 118.' Po- 4sitioning the tubular casing 123, withv respect to the standard 117, the spring 132, is

, brought into action by means of the head piece 127, which may be drawn to compress said spring to any amount` desired, by means of the nuts 126, which engage the threaded spindle 125, and freely shoulder against the end of the member 123.

Having once adjusted the amount of compression in the spring 132, the member 123 is adjustably positioned to fix the roller 130 in a position to govern the movement of the cam 115, so that if the pressure between the wheel 4, and the pan 86, is so greatas to cause the oscillating member 9, to rock back,-causing the surface 115b to press against the roller 130, the head piece 127, will yield, if the pressure is greater than that to which`the spring 132, has been drawn up to by means of`the nuts 126, thus practically maintaining the pressure between the wheel 4, and the article 86, with the exception of the small additional amount which is brought about due to the additionalcompression of the spring 134.

llf it is desired to put extra pressure upon the wheel 4, or reduce the same temporarily, the operation can be governed by manipulating the hand wheel 120.

lin the development of the cam 115', to inake it complemental to the surface of the object 86 as said object is positioned upon the mandrel 82, we must take into account the fact that the roller 130, contacts said cam on the opposite side to the point of contact between the object 86, and the wheel 4.

We must also take into account the fact that the mandrel 82, oscillates through a larger arc than the shaft 112, permitting us to make a cam much smaller `than if the cam shaft were coincident with the mandrel upon which the object is turned. The contour of the cam may be determined by putting an object to be dressed upon the mandrel 82, `and supporting a board or the like, upon the shaft 112, and having a fixed marker contactin said board; then slightly turning the ob] ect ,86, in contact with the wheel 4, or a fixed surface representing the same, and describing a line upon the said board, which linel represents the periphery of the cam which would in operation follow in Contact with the axis of the roller 130. Modifications from this peripheral line of the cam, can be made to suit the diameter of the roller used, in arriving at the true contour of the surfaces 115aL and 115), so that in operation these surfaces intermittently contacting the roller 130, furnish guides for determining the contact of the object 86, with the wheel 4. Y

r1`he oscillating member 9, is balanced by the leaf spring 133, the action of which spring can be designed to always maintain va contact between the surface 115", of the cam 115, thus enabling us to dispense with the internal surface 115, and simplifying the construction over that herein shown.

Other modifications of this invention can be made, without departing fro-m the spirit and scope thereof. 1 therefore do not wish to be confined to the detailed construction herein shown. Hence \l[ claim:

1. In a feeding machine for applying a piece of work to a dressing wheel, a frame, a rocking member, trunnions on said member, journaled with said frame and'supportin said member for oscillation thereon, a driven shaft journaled with said trunnions and positioned to have its axis common with the axis of oscillation of said rocking member, 'a mandrel jcurnaled on said member, adapted to hold a piece of work in position to contact said dressing wheel, intervening mechanism between said driven shaft and said mandrel, whereby said mandrel is given a rotary motion by said driven shaft, other mechanism between said shaft and said mandrel, whereby said mandrel is given a longitudinal reciprocating motion in the direction of its axis by said driven shaft, and means for driving said driven shaft.

2. 1n a feeding machine for applying a piecev of work to a dressing wheei, a frame, a rocking member pivoted 0n said frame, a driven shaft journaled with said rocking member and positioned to have its axis coinmon with the axis of oscillation of said rocking member, a drivingshaft having its axis common with an extension ofthe axis of said driven shaft, transmission mechanism connectin said shafts, a mandrel journaled on said member adapted to hold a piece of work in position to contact said dressing wheel, intervening mechanism between said driven shaft andsaid mandrel, whereby said mandrel is given a rotary motion by said driven shaft, other mechanism between said shaft and said mandrel, whereby-said mandrel is given a longitudinal reclprocating motion in a direction of its axis by said driven shaft, and means for driving said driving shaft.

3. In a feeding machine for applying a piece of work to a dressing wheel, a frame, a rocking member, trunnions on said member, journaled with said frame and supporting said member for oscillation thereon, a mandrel j ournaled on said rocking member, adapted to hold a piece of work in contact with said dressing wheel, means for driving said mandrel, manually adjustable traveling means on said frame and cooperating means connected with said traveling means, adapted to govern, automatically, the pressure between said work and said Wheel; said coperating means being' positioned by said travleling through manual adjustment thereof,

' the movements of said coperating means work and said wheel, intervening mechanism connecting said last named means with said mandrel, the movements of said last named means being synchronized with the movements of said mandrel by said intervening mechanism.

5. In a -feeding machine for applying a piece of work to a dressing wheel, a frame, a movable member engaging said frame, a mandrel journaled on said member, adapted to hold a piece of work in contact with said dressing wheel, means for driving said mandrel, a guiding element, a cam positioned between said dreing wheel and said element and adapted to govern the position 'of said movable member with respect to said 'dressing wheel, intervening mechanism between said cam and said mandrel, adapted to synchronize their movement, means acting through said movable member and said cam, to govern the pressure of said piece of work on said dressing wheel, the pressure of said cam against said guiding element being in 'an opposite direction to the pressure of said' piece of work against said wheel, the cam elng so proportioned to the shape of said piece of work, that in its synchronous movement with respect to that of said piece of work onsaid mandrel, the distance between the-center of the cam and its contact oint with said guiding element, changes wit respect to the distance between the center of the piece of work and the said wheel, in a manner to have one distance increase, while the other distance decreases.

6. In a feeding machine for applying a piece of work to a dressin wheel, having a fixed axis, a frame positive y positioned with respect to said dressing wheel, a guiding device positively positioned with respect to said frame, a movable member adjustably positioned with respect to said frame, a holdlng piece for said piece of work on said movable member, a governing element having a contoured surface in bearing engagement with said guidino` device and havin a positive connection with said member, 1nterveninfg mechanism between said governing element and said holding means adapted to synchronizev their movements, the contoured surface of said guiding element beingl conformed to the shape of the piece of work supported in said holding piece, said govermn element being so positioned in said machlne and so proportioned to said piece of work, as to maintain the desired contact between said piece of work and said wheel, by having its to and fro movements, relatively to said guiding device, during the operation of the machine, occur contrary to the to and fro movements of the piece of work, relatively to the dressing wheel.

7. In a feeding machine for applying a piece of work to a dressing wheel, a frame, a movable member engaging said frame, a sliding shaft journaled on the said movable member, a bevel wheel fixed to one end of said sliding shaft, an extension bracket projecting from said moving member, and positioned near said bevel wheel, a short shaft positioned in said extension bracket at an angle to the Said sliding shaft, a larger bevel wheel than the first mentioned one said larger wheel being on said short shaft and engaging said first mentioned bevel wheel, ar

yoke bracket pivoted on said short shaft, means for adjustably securin said yoke bracket at an angle with sald extension bracket, a mandrel journaled in said yokebracket at an angle with said short shaft, another bevel wheel, smallerthan the said larger bevel wheel, engaging the same, and tted on said mandrel.

8. In a feedingA machine for applying a piece of work to a dressing wheel, a frame, extension means on said frame, a tube ad-I justably'ixed on said extensionmeans, a; coller fixed to said tube, an arm slidably mounted upon said tube positioned to contact said collar, an elastic means within said tube adapted to draw said arm against said collar, said elastic means being connected by other means to said arm.

9. In a feeding machine foi' applying a piece of work to a dressing wheel, a frame, said frame having a base and jacks operative on said base, adapted to adjustably support said base off the floor and to fix the position of said machine with respect to the .axis of said dressing wheel.

- 10. In a feeding machine for applying a piece of work to a dressing wheel, a frame, said frame having a base, rollers on said base adapted to support the same olf a continuously flat oor and to portably carry said machine in any angular direction on said floor with respect to said wheel.

11. In a feeding machine for applying a piece of work to a dressing wheel, a frame, a base to said frame, rollers positioned on said base adapted to support the same oli' the floor, jack screws, means on said base to raise the same above the floor, and support said basethereon, and to relieve said rollers from said support.

12. In a feeding machine for applying a piece of work to a dressing wheel, a frame, a mandrel shaft on said frame, a reversible clutch connected with said mandrel shaft, adapted to revolve same in either direction.

13. In a feeding machine for applying a piece of work to a dressing wheel, a frame, holding means for supporting said piece of work, means on said frame for journaling a shaft,-a bevel gear on said shaft, a bracket fixed to said means, a pivot pin on said bracket, positioned to have its axis pass transversely through the axis of said shaft, a bracket-piece pivoted upon said pivot pin, a mandrel shaft jburnaled in said bracket piece, a bevel gear journaled on said pivot pin and meshing with the first mentioned bevel gear, and a third bevel gear meshing with the second mentioned bevel gear and mounted upon said mandrel shaft, said pivot bracket being adapted to be adjustably positioned at various angles with respect to the axis of said first mentioned shaft.

14. In a feeding machine for applying a piece of work to a dressingv wheel, a frame, means on said frame for ournaling a shaft, a bevel gear on saidshaft, a bracket ixed to said means, a pivot pin on said bracket positioned to have its axis pass transversely through the axis of said shaft, a bracket piece pivoted upon said pivot pin, a mandrel shaft journaled in said bracket piece, a bevel gear journaled on said pivot pin, larger "than and meshing with the first mentioned bevel gear, and a third bevel gear equal in size to the lirst mentioned bevel gear, meshing with the second mentioned bevel gear, and mounted upon said mandrel shaft, said pivot bracket being adapted to be adjustably positioned at various angles with respect to the axis of said first mentioned shaft.

15. In a feeding machine for applying a piece of work to a dressing wheel, a frame,

a crank wheel journaled with said frame, said crank wheel having a crank pin radially adjustably positioned thereon, a rack bracket on said frame, a rack in sliding engagement with said rack bracket, means connecting said rack with said crank pin, a second rack bracket on said frame nand a second rack slidably engaging said rack bracket, gearing operatively connecting said racks, whereby the motion of reciprocation is given to said piece of work.

16. In a 'feeding machine for applying a piece of work to a dressing wheel, a frame, a mandrel journaled on said frame, for rotation thereof, rack means on said frame connected with said mandrel, adapted to give the same the motion of reciprocation, a shaft journaled in said frame, a hub on said shaft, a ha'nd lever releasably lfixed in said hub adapted for manual oscillation therewith, intervening mechanism between said shaft and said rack means for connectrack means.

17. In a feeding machine for applying a piece of work to a dressing wheel, a frame, a rocking member pivoted with said frame, the weight of said rocking member being above its pivotal support with said frame, balancing means fixed to said frame and connected with said vrocking member adapted to return said member to its normal vertical position when swung to either side of said vertical position when said balancing means becomes free from other forces to exercise its functions.

18. In a machine for operatively contacting a piece of work and a dressing wheel, a supporting structure, holding means for holding said piece of work, a driving shaft journaled in said structure, a crank-wheel, a crank-pin radially and adjustably positioned on said wheel, a rack-bracket on said structure, a rack in sliding engagement with connecting said holding `,means with said second rack, for giving a' motion of reciprocation to said piece of work, and intervening mechanism between said shaft and said crank-wheel for turning the same.

19. In a machine for applying a piece of Work to adressing Wheel, a frame, a rocking member journaled to said frame, a drivias f ing shaft, a crank-Wheel, a crank-pin radially and adjustably positioned' on said Wheel,l a rack-bracket on said member, a rack in sliding engagement with said rackbracket, means operatively connecting said rack with said crank-pin, the length of stroke of said rack being adjustably xed by positioning said crank-pin with respect to the center of said crank Wheel, a second rack-bracket on said member, a second rack slidably engaging said second rack-bracket, means operatively connecting said racks,

other means operatively connecting said holding means with said second rack,

whereby a motion of reciprocation is im- 15 parted to said piece of Work, and intervening mechanism between said shaft' and said crank-wheel for turning the same.

Buffalo, N. Y., Jan. 25, 1917.

ROBERT M. FOTHERINGHAM.

Witnesses:

J. EDW. THEBAUD, EDWARD F. GINGRAS. 

